Evolutionary dynamics of the lion revealed by host and viral genomics

This study examined lion population history using both the lions' own genetic markers and the genetic signatures of their viruses, an innovative dual approach. By analyzing host DNA alongside feline immunodeficiency virus variants, the authors reconstructed lion demographic history, structure, and past bottlenecks across Africa and India. They detected distinct populations and inferred patterns of expansion and isolation that bear on subspecies delimitation. The viral data offered an independent record of lion movements and contact, complementing the host genetics. For taxonomy and conservation, the work documented genetic partitioning relevant to defining management units and reinforced the picture of structured lion populations. It stands out methodologically for using co-evolved pathogens as markers of host history, a technique with broad application in felid population biology.